320440304523 has 4 divisors (see below), whose sum is σ = 427253739368. Its totient is φ = 213626869680.

The previous prime is 320440304501. The next prime is 320440304537. The reversal of 320440304523 is 325403044023.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 320440304523 - 2⁸ = 320440304267 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320448304523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53406717418 + ... + 53406717423.

It is an arithmetic number, because the mean of its divisors is an integer number (106813434842).

Almost surely, 2^320440304523 is an apocalyptic number.

320440304523 is a deficient number, since it is larger than the sum of its proper divisors (106813434845).

320440304523 is a wasteful number, since it uses less digits than its factorization.

320440304523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106813434844.

The product of its (nonzero) digits is 34560, while the sum is 30.

Adding to 320440304523 its reverse (325403044023), we get a palindrome (645843348546).

The spelling of 320440304523 in words is "three hundred twenty billion, four hundred forty million, three hundred four thousand, five hundred twenty-three".